First some disclosures so you know what my presuppositions are – I do not believe in dispensationalism, nor do I buy the idea of an Old and New Testament (in terms of differing dispensations). I believe the Bible to be one continuous book, and that God has not changed in His approach towards or in His dealings with His people through history. After the Fall of Man, God always intended a way for our salvation which has never changed (and which was NEVER a system of law and works, but always based on faith and grace - this is how the Jews through the millennia were saved themselves). What was true in the Old Testament is true today, except in the obvious examples where it was changed by the coming of Jesus Christ – for example, His sacrifice and His propitiation for our sins, the loss of the temple and old sacrificial system, and the change in the priesthood. I think this is shown by Jesus (and the apostles) being a strong supporter of the “Old Testament” as seen in their frequent quotations of it (it was the only scripture they had, and they never threw it out as irrelevant). Any division of Old and New Testament is man-made. Although it is not particularly relevant to our current discussion, I am postmillennial and post-tribulational. And, I absolutely believe in salvation by faith, not works.
There are several covenants considered in the Bible, always between God and His people. Not only Abraham, but other major ones include those with Noah, Moses, and of course, the New Covenant (Jer 31:31, Heb 8:7-13), which is really only a modification and improvement upon the existing Abrahamic covenant. - They are each between God and man, and as far as I know, they can never be considered to be one-way covenants. They all center around the relationship - "I will be your God, and you will be my people." (Lev 26:12) They all have obligations and promises. Within the New Testament is a description of how the covenant has transferred from the Jewish nation alone to the entire church as the Gentiles have been brought in. (Actually, Gentiles could always be counted among God's people if they had faith and were willing to be circumcised and repent from their sins.) People , Jewish and Gentile, have always been saved by faith, and faith alone, both in the Old and New Testaments. Reading Heb 11 makes it clear in the "Hall of Faith" that all the Old Testament people described there were saved by faith, and it has always been as a gift of grace (Scripture states that both faith and salvation are given as gifts of grace). Covenant theology is a huge subject, very important, and very neglected in the church today - which is a real shame, because there is so much to learn about our very rich relationship with God.
But anyway, the concept of the covenant has always required certain things from both parties. All these things fall under the concept of grace, because they are all unmerited blessings - God was under no obligation to give us any of these promises and covenants, we did nothing to earn any of it. All we have ever EARNED is judgment for our sins, that is what we deserve, but in God's grace He has decided to give us a way to be saved.
It is clear that certain things are required of us though, still within the bounds of grace. Repentance and obedience are required in Scripture. Peter preached repentance at Pentecost, Paul preached it at Mars Hill, and before King Agrippa "declaring both to those of Damascus first, and also at Jerusalem and then throughout all the region of Judea, and even to the Gentiles, that they should repent and turn to God, performing deeds appropriate to repentance." (Acts 26:20), "bear fruits in keeping with repentance" (Luk 3:8), “Unless you repent, you will all perish.” (Luk 13:5) - "God can not be mocked, a man reaps what he sows. A man who sows to please his sinful nature, from that nature will reap destruction: the one who sows to please the Spirit, from the Spirit will reap eternal life.” (Gal 6:7-8). Jesus said, “If you love me, obey my commandments. - You are My friends if you do whatever I command you. - If you keep My commandments you will continue in My love, as I have kept My Father's commandments and continue in His love.” (Various Scriptures in John, especially chap 15). Lastly, Christ said, "Do not think that I came to abolish the Law or the Prophets; I did not come to abolish but to fulfill. " (Mat 5:17).
We are called to perseverance. “You need to persevere so that when you have done the will of God, you will receive what He has promised.” (Heb 10:36). Faith and belief and repentance are all required from us as our role in the whole covenant of our salvation through Jesus Christ. And lastly, I would emphasize James as he says, ”What good is it my brothers if a man claims to have faith, but has no deeds? Can such a faith save him?” (James 2:14), for our works prove our faith to be living – I think that the works of which James speaks are an obedience to God’s commandments.
There is no question but that right behavior is an unavoidable aspect of God’s grace as His grace is administered through the covenant He has made with us. You can also make the point that right behavior is impossible for us except that God gives us the power to do so (grace) through the ministry of the Holy Spirit to us.
Perhaps one of the most emphatic Old Testament examples of the way God deals with His people is in Deuteronomy 28. Although the theme is repeated in many places in both Old and New Testament, this chapter is a sterling example of how God’s covenants have blessings and curses, promises and obligations. Again, I don’t believe that God changes, and that grace is certainly not a New Testament phenomenon. It existed then as it exists now, and these covenant promises and obligations, these blessings and curses existed both then and now. By obeying Him, we are not violating grace at all – He was the one to come to us and tell us that this was the way He wished to bless us, to offer His grace. Again, all we have ever earned and deserved is His judgment, so anything else that is given to us is unmerited and falls under the covering of grace. But instead, “even while we were yet sinners”, God gave us a promise of salvation, and many other blessings that are graceful. In addition, He also told us that we needed to obey, even going so far as to say “It is better to obey than to sacrifice.”
Let’s face it, the one thing that you CAN’T say about Christians and the church today is that they are trying TOO hard to obey God’s law and commandments. None of us can force God to do anything; He will not allow Himself to be put into that situation with us. He only deals in terms of His will and He administers His will to us through His love and His grace. Even if we wanted to make God respond to our behavior, whatever that might be, we couldn’t be effective at it. And you are very right, that IS the big difference between Christianity and all other earthly religions.
This has gotten awfully long and doesn’t even scratch the concept of how God deals with us through His covenants, but it does start the discussion between us. I, too, enjoy these discussions a lot.
Where do we go next with this?